Associate Professor, School of Materials Science and Engineering, Central South University, China

Biography: Dr. Deng is currently an associate professor in Central South University. She received her PhD degree from Central South University in 2012. Her research interests mainly focus on new aerospace aluminum alloys, nano-particles, microalloying, materials characterization, corrosion and welding of advanced alloys, aiming at developing novel light structure materials and establishing the relationship between microstructure and material performance. As first/corresponding authors, she published an academic monograph and more than 30 SCI research papers in peer-reviewed journals. Dr. Deng acts as project leaders for 7 research projects supported by the National Natural Science Foundation of China, the Young Elite Scientist Sponsorship Program by CAST, the Hunan Province Natural Science Foundation, the Hunan Province Innovation Talent Plan Project and the China Postdoctoral Science Foundation.

Speech Title: Achieving high strength, high strain rate superplasticity, good weldability and admirable corrosion resistance of aerospace Al alloys by introducing Al₃(Sc₁−xZr_x) nano-particles.

Abstract: With the development of national defense and aerospace industry, it is urgent to develop new aluminum alloys with higher strength, better formability, more excellent weld performance and more admirable corrosion resistance to satisfy the requirement of weight saving and high reliability. Aluminum alloys modified by coherent Al₃(Sc₁−xZr_x) nano-particles have been attracting great interest, which are promising to provide unique solutions to the limitations that conventional aluminum alloys face. Based on our work, this presentation outlines the effects of coherent Al₃(Sc₁−xZr_x) nano-particles on mechanical property, superplasticity, welding performance and corrosion behaviour on aerospace Al-Zn-Mg and Al-Mg alloys, and the mechanism for improving strength, ductility, weldability and corrosion resistance of aerospace aluminum alloys by introducing Al₃(Sc₁−xZr_x) nano-particles particles will be revealed by microscopy methods. Consequently, this work offers a new idea for developing new aerospace aluminum alloys with outstanding comprehensive properties, and is of great significance in the highly reliable application for spacecraft and the sustainable development of aerospace project.

Keywords: Aluminum alloys, Mechanical property, Welding, Corrosion, superplasticity, Nano-particles